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Compact electrocatalytic sewage treatment unit for maritime use
| Details |
Inventors: Krause, William A.; Langeland, Leonard E.;
Assignee: Omnipure, Inc. (Houston, TX)
Primary Examiner: Kaplan; G. L.
Assistant Examiner:
Attorney, Agent or Firm: Seed, Berry, Vernon & Baynham
A compact, relatively small unit for treatment of wastewater for discharge into maritime waters is disclosed. The wastewater is received in a surge or retention tank and is delivered by gravity flow or pumped to a macerator for comminution of the solids content of the wastewater. Prior to entering the macerator, salt water on a controlled flow basis is added to the wastewater in sufficient amounts to insure a high enough salt content for use as the electrolyte in an electrocatalytic cell. From the macerator the wastewater to be treated is directed into a vertically oriented, elongated, electrocatalytic cell having a plurality of parallel, closely spaced electrodes therein positioned parallel to the flow of wastewater therethrough. The wastewater is directed through the electrocatalytic unit. The end electrodes of the spaced electrode plates are connected to a source of direct current sufficient to generate chlorine, oxygen and other treating chemicals in situ. The gases generated in the cell, entrained with the liquid, flow out of the electrocatalytic cell with the liquid into the standpipe of an effluent tank where a negative pressure separates the entrained gases from the liquid and vents them to the atmosphere. The heavier solids remaining in the discharged treated liquid are allowed to settle in the bottom of the effluent tank and the remaining effluent is discharged. |
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DETAILED DESCRIPTION It is a primary object of this invention to provide a compact, relatively small low-weight unit for treatment of wastewater by electrocatalytic means, primarily for discharge into maritime waters, the unit requiring only a source of electrical power of the capacity that is generally capable of being supplied by the vessel's electric generator.
It is a further object of this invention to provide a unit for the electrocatalytic treatment of wastewater streams wherein the electrocatalytic cell has electrode plates cast in place parallel to the flow of wastewater therethrough using a castable synthetic polymer.
It is a further object of this invention to provide a unit for treatment of wastewater wherein the wastewater is initially received in a surge tank, mixed with a measured quantity of salt water or sea water, macerated and flowed through an electrocatalytic cell where oxygen, chlorine and other disinfecting chemicals are generated in situ, the effluent discharged into an effluent tank where heavier solids are allowed to settle in the tank for recycling and where gases entrained in the treated wastewater discharged from the cell are vented to the atmosphere by creating a negative pressure in the standpipe of the effluent tank.
It is a further object of this invention to provide an electrocatalytic system for treatment of wastewater wherein the direct current supplied to the electrocatalytic cell is automatically varied to meet the resistance characteristics of the wastewater being treated.
These and other objects are accomplished by a unit which utilizes an elongated electrocatalytic cell having an inlet and outlet, the cell containing a plurality of closely spaced electrodes between the inlet and outlet thereof parallel to one another and parallel to the flow of wastewater to be treated, the electrodes cast in place in the cell with an electrically non-conductive, castable, synthetic polymer.
A surge tank receives the wastewater to be treated and holds it to allow separation of non-maceratable solids and also even out the flow rate of wastewater through the cell
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